The localization / delocalization dilemma in the electronic structure of d- and f- element oxides

The electronic structure of many of the oxides containing d- and f-elements has long been a challenge for theory. For example, the traditional workhorses of density functional theory, the local density approximation (LDA) and the generalized gradient approximations (GGA), predict most of these systems to be metallic, when in fact they are insulators with band gaps of several eV. These problems reflect the localization/delocalization dilemma faced in systems with weak overlap and seem to be largely overcome by the new generation of hybrid density functionals developed for molecular studies. Only recently has it been possible to apply these functionals to solids but in the cases studied thus far we find a distinct improvement. The hybrid functionals predict the correct insulating ground state, band gap, lattice constant and magnetic behavior at 0K, where known. I will review the origin of the problem, how hybrid functionals differ from traditional ones, and recent applications to MnO, CeO2, Ce2O3, and the actinide oxide series AnO2, An = Th ... Es

Integrating higher degree education with practice: exploring the value proposition of executive MBA apprenticeships

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI linkPurpose – The study aims to explore how the collective representations of stakeholders associated with an Executive MBA (EMBA) apprenticeship are conceptualised, and what value elements are perceived as relevant for personal, professional and organisational development. Design/methodology/approach – Forty stakeholders participated in a mixed methods-based group concept mapping (GCM) approach, representing the tripartite relationship of an EMBA apprenticeship. This approach allowed the deconstruction and shared understanding of the value proposition of higher degree apprenticeships. Findings – Analysis identified seven conceptualised value clusters around an eight central cluster “Professional Development”. Two regions of meaning were identified: the personal dimensions of apprentices and their contribution within and to their organisation. Findings showed that a work-based designed curriculum improves confidence and communication skills and that much of the value proposition is personal and self-managed by the apprentices. The tripartite relationship was shown to be incomplete and inconsistent, particularly regarding mentoring and reflective practice. Practical implications – The pandemic has brought about significant changes in business practice. This study identifies several areas for improving higher degree apprenticeship pedagogy in readiness for the new business landscape, as well as identifying limitations of the tripartite relationship. Originality/value – The study addresses a gap in the literature by exploring the value proposition an EMBA apprenticeship programme. The interrelatedness of cluster concepts has identified value elements missing from previous apprenticeship delivery. Deconstructing the senior leader apprenticeship enables educators to redesign and refine models of engagement for improving the apprenticeship experience. Keywords Higher degree apprenticeships, Mentoring, Reflection/reflective practice, Work-based learning, Vocational education and training, Executive MBA Paper type Research pape

Iris recognition using the JAVAVis Library

This project has been created to develop a biometric identification system through a man’s iris using a computer to perform the processing of the pictures. To develop this application, and to differentiate the project from others who have already implemented, we have used the image processing library JAVAVis and JAVA as a programming language